Lexmark C750 Service Manual - Page 161

5060-00x Fuser service check Cold fuser service If error code 122, 123, 126, 127, 128, 129, 130, 131, 132, or 133 is displayed, the printer detects a problem in the fuser hot roll or back up roll fuser lamp circuits, fuser hot roll thermistor, back up roll thermistor, engine board or LVPS fuser control circuits. Hot fuser service Error codes 124, 125, 134, and 135 appear whenever the printer detects a problem with the fuser running over temperature or the fuser lamps have been on too long. Excessive fuser drive motor assembly noise Step 1 Action and questions Excessive noise from the fuser drive motor assembly- check for correct installation of the fuser drive motor assembly. Is the fuser drive motor installed correctly? Yes Go to step 2 No Correctly install the fuser drive assembly. See "Fuser drive assembly removal" on page 4-33. Replace the fuser top duct. See "Fuser top duct removal" on page 4-34. 2 Install a new fuser top duct. See "Fuser top duct removal" on page 4-34. Is there still excessive noise from the fuser drive motor assembly? Replace the fuser drive assembly. See "Fuser drive assembly removal" on page 4-33. Diagnostic information 2-127